How to fix data error cyclic redundancy check and recover lost data?

Posted by Juno to RAW Drive Data Recovery on June 21th, 2017

I was transferring files from my external hard drive (Seagate, 250GB) when the power shut off. When I use the drive again, Windows suggested me to format it, but I can't do it since I have many important files on it. After giving up formatting, I got error message "Drive is Not Accessible. Data Error (Cyclic Redundancy Check)". Is there any way to solve this problem?

If you have met "Drive is Not Accessible. Data Error (Cyclic Redundancy Check)" when try to open a drive, and are searching for method to fix this error, you are at the right place. This passage will introduce what is data error cyclic redundancy check and more importantly, how to fix data error cyclic redundancy check.

What is data error cyclic redundancy check?

Cyclic redundancy check is an error-detecting code used in digital networks and storage devices to detect accidental changes to the original data. This checking procedure can quickly recognize when data is damaged. When you get this error, it indicates that the drive does not pass this check and some of the files are corrupted.

Data error cyclic redundancy check can be caused by many factors, such as an unsuccessful program installation, registry corruption, a cluttered hard disk, or misconfigured files. But at most of the time, data error cyclic redundancy check will emerge when there are bad sectors on your drive. Bad sector is usually caused by hardware problem, and as is known to all, hardware problem can't be solved by software. But you can still recover data from inaccessible drive with data error cyclic redundancy check using data recovery software.

Simple steps to fix data error cyclic redundancy check

To ensure the security of data saved on the inaccessible drive, you should firstly recover data from it, and then check drive errors and try to fix it.

Step 1: Recover data from inaccessible drive with data error cyclic redundancy check

At this step, the only assisting tool you need is iBoysoft Data Recovery, a relible data recovery software that can recover data from inaccessible hard drive with data error cyclic redundancy check, recover data from RAW, formatted, corrupted, not formatted, not initialized hard drive, recover deleted files even if emptied from Recycle Bin, recover data from deleted or lost partition, etc. on Windows 10/8/7/Vista/XP and Windows Server 2016/2012/2008/2003.

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Tutorial to recover data from inaccessible drive with with data error cyclic redundancy check using iBoysoft Data Recovery

1. Download and install iBoysoft Data Recovery on your computer.

2. Launch iBoysoft Data Recovery and then choose the inaccessible drive.

Recover data from inaccessible drive with data error cyclic redundancy check

3. Click "Next" to search for lost files in the inaccessible drive.

4. Preview the searching results. After that, select the lost files and then click "Recover" button to get them back.

5. Check to ensure you have recovered all lost data.

Aside from recovering data from inaccessible hard drive with data error cyclic redundancy check, iBoysoft Data Recovery can also recover data from inaccessible external hard drive, inaccessible USB flash drive, inaccessible SD card, inaccessible pen drive, etc.

Step 2: Fix data error cyclic redundancy check with CHKDSK

After all files have been successfully restored, you can use CHKDSK to check the drive for errors & bad sectors and see whether it can be fixed.

1. Go to Disk Management, right-click the inaccessible drive, and then click "Properties".

2. Choose "Tool", and then click "Check now" button.

3. Tick both "Automatically fix file system error" and "Scan for and attempt recovery of bad sectors" options, and then click "Start".

It will take quite a long time to check and fix the inaccessible drive, please be patient and don't interrupt during that process.

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